Warp stop motion for looms



N QPTHROP .WARP STOP lMOTION FOR LOOMS vFiled July 20, 1.922 5 Sheets-Sheet 2 3. No-WHRGP WAR? STOP MOTION FOR LOOMS 1922 Sheets-Sheet 3 Filed Jul im "my i925- NQRTHRQP WARP STOP MOTON FOR LOOMS Filed July 20, 1922 5 Sheets-Sham u l n cip n jam E925. Y 3,522.9@

. J. NORTHROP WARP STOP MOTION FOR LOOMS Filed July 20, 1922 5 Sheetsheet 5 Patented Jian. 13, 1925.1.-

muren- STATESPATENT oFFlci-z.

JONAS N ORTHPP, lOF- HOPEDALE. MASSACHUSETTS, ASSIGNOR TO HOPEDALE M AN`U- FACTURING COMPANY, OF MlILFORD. MASSACHUSETTS, A CORPORATION-F MASSA- CHUSETTS.

Applcatibri 'Jileil July 20.

the art to which it appertains-to malte and use the same.

The presentinvention relates to an improvement inwarp stop motions for looms. Upon the reaking of a warp, a drop Wire falls and stops the loom Now to find where the break occurred is sometimes a matter ot difiiculty' because the upper end of the drop wire is concealed in the body ci:`

the Wires and the lower end -ofthe drop wire is not easily visible. The object of the present invention is to produce a warp stopmotion which will not'only stop the loom upon the dropping of the Wire,. but 'wills open thejwarp' at the broken warp ready for piecing. Tothis end, the present invention consists in the warp stop=motion hereinafter described and particularly def p f lar to'thatvabove. described, is provided at fined in the claims.

'In the accompanying drawings illustrating the preferred form of the invention; Figure 1 is a sectional elevation of the loom I 4 with the invention' embodied therein: Fig.

2 is a plan of the same.' the arch beingl shown in section: Fig. 3 is an enlarged planof a portion of the mechanism; Figs. 4 and 5 illustrate portions of the mechanism in different positions; Figs. 6 and 7 illustrate the operation of the device on the dropping of a wire to open the Warp; Fig, 8 is aperspective view of the actuating device for the stop motion; and Fig. 9 is a. detail of construction hereinafter referred to.

The illustrated embodiment of the. inven- 'tion is described as follows: The Warp eXf tends from the Warp beam 1 over the Whip roll 2 tothe drop Wires-3, through the lease rods 4,- heddles 5, through the lay 6, and thence tothe sand roll 7 and take up roll 8. The Wefthammer 9 is actuated by the cam 10 in the usual manner. The' drop Wires 3v are supported in a frame 11 in thel usual manner, except as hereinafter described. The Warps pass one through a drop Wire, inoneabank and the other through a drop wire wA'nPs'roP MOTION ron` Looms.

192e. sei-iai No. 576,292.

in the second bank passing over the Warp supporting rods 1'2 in the usual manner. The 'frame 11 is provided at its bottom with a ladder 13 so that when a warp breaks and a dropwire falls, as shown in dotted lines in Figs. 6 and 7, it falls between the wires H of the ladder 13. The detector bar 15 is serrated. as shown, and engages the drop wire and pushes it laterally to one side, as shown in Fig. 6. A separator 16 is provided in theV center of the .bank ot drop wires which consistsl of aplate provided with grooves 17 .to receive and A'guide the detectors 15. The separatorV 16 is provided with a pin 17f which 'passes through a hole 18 in the frame 1 1 and it is normally .held in vertical position by the spring 1,9 which -draws it up to and holds it against the frame '11. VThena. drop Wirefalls, the first movement of the detector bar to .the

left, as seenin Fig. engages the fallen wird` and pushes-that wire and others beyond it along! into the position shown in Figa 6, tberebyopening the warp and forming a' clear indication ofthe place where the drop Wirefell` enablingr the operative quickly to find' and piece the broken warp. An additional separator .16, exactly simithe sidefv'cif the loom toward which the drop wires aifcaused to be pushed on failure of The d ctl n' bars V15 are supported in connection. to the detector lever 20. The

' lever 2O is provided with .a striker 21 which is pivotedl to the lever at 22 and normally occupies the position shown in Fig. 4, being held there by the compression springs 23 received in the socketinthe end ofthe detector leverA `20. Downwardly extend-ing arms 24 attached to the striker carry a pin 25 to which the `detector bars 15 are attached. It will be seen that as the detector lever moves tothe left pushing the detector bars with it, it" meets the resistance presentedby a dropped wire pressing against other wires and Warps` and causes a thrust to be exerted upon the detector bar, which .tips the striker 21,about .its pin 25', thereby raising it to the positioiii alssshown in Fig. 5, so that upon the reyerse movement of the detector lever 20, \v g striker will be in position to engage ember, presently to be de-" scribed, by which the loom is knocked off. To the detector lever 20 is attached the arm 26 b means of which the detector lever 1s oscil ated. To the end of the arm 26 is at- ,5 tached a block 27 by means of a pin 28.'

ing rod 29 is provided on its lower end withl This block 27 receives the operating rod 29 which passes through a vertical hole in it and is secured thereto by nuts 30, one 'above and the other below the block il The operata block 31 which normally rests on the arm 32 attached to the rear end of the weft hamwhen 'breakage is detected` the weft hammer may descend without pulling` down the rod 29, see Fig. 1. A coiled spring 33 normally .tends to swing the detector lever 20 tothe right, as shown in Figs. 4 and 5, thereby retracting the detector bar and constituting means for pulling the bar to the right, as'- viewed in Figs. 4 and'5. Upon the detec- .tion of warp breakage and the occurrencel of resistanceto the free movement of the detector bar to the left, as shown in Fig. 4, the striker is elevatedfas has been described,

so that its outward end wipes against the under side of a striker plate 40, whereupon at the beginning of the return movement of the detector bar,.the end of the striker having risen engages the striker plate and 35 pushes it to the right, as viewed in Fig'.4,

so that it occupies the o'sition illustrated in Fig. 5. This striker-p ate 40 has a base 41' which is adjustably attached to the rock lever 42 pivoted at 43 on the bracket 44 secured to .the arch, as shown in Fig. 2. The lever 42 is secured to the rock shaft 45 and its forward end 46 passes under the knockoff slide rod 47 connected at its forward end to the knock-oli lever 48 and supported at its rear end in the slot 49 in the plate 50 forming a part of the bracket 44. The knock-olf slide rod 47 carries a striker '51 which is adapted to be struck by the striker plate 52 carried by the lay, see Fig. 9, so that when the knock-olf slide rod is elevated in the manner described, upon the next back-- ward movement of the lay the striker plate 52 will engage the striker 51 and exert a pull upon the rod which will cause the knock-olf lever to release the shipper lever 53 and theieby stop the loom. The rock lever 42 is provided with a pin 60 which is received in the slot 61 in the plate 50 so that the movement of the lever 42 is limited.

A stop is secured to the loom frame and provides a support for the arm 26 which operates the detector lever 2O so that when t e detector lever is moving toward thel right, it can move only so far as the stop .70 permits. The arm 26 attached to the detector lever 2O is provided with threeholes 71 in either one of which the in 28 maybe placed to adjust the stroke of t e detector bar.

It will be observed that the resistance of` fered by the warp to the lateral movements of the drop wires when one of' them falls loom. The detector slide normally reciprocates freely'through the dr p wires except when one of them falls and0 engages .it and then its motion is less in extent than` otherwiseI it would be causing it to tip the striker finto operative position. l

Having thus described the invention, what is claimed is: l

. 15A warp stop motionforlooms having,

tector slide provided with teeth, means for actuating the detector slide,a shipper lever, and'. connections between the detector slide and the shipper lever, the warps operatingvon the falling of al 'drop wire to o pose a resistance to the reciprocation of t e slide and thereby cause loom stoppage.

2. A warp stop motion for looms having,

, and engages the detector slide, operates through the means described to knockoi the in combination, a set of drop wires, a dein combination, a set of drop wires, means", for4 supportin the drop wires rovided with devices to ho d 'thelower-en drop wire lfrom lat'eral. motion, a detector slide having teeth'aklapted to engage s fallen dop wire and to push't'hedro wires beyond it tojnclined position'wvhet y opening the warp. {1,- .y

3 A warp stop motion -for'looms having, in combination, a set of d'ro wires, means for supporting them provide l ,with a ladder below the lower ends of the 'drop wires be-v tween the rungs of which a fallen wire will extend, a detector slide provided with, teeth to engage the upper part of a fallen wire and tip it, and with it other drop wires beyond to inclined position to open the warp and to indicate position of a breakage.

4. A warp stop motion for looms having, in combination, a set of drop wires, means of a fallen ico llO

for supporting them provided withdevices supported below the drop wires to engage the lower end of a drop wire when it falls andyto hold it from lateral motion, a detector slide adapted to engage the upper end of a fallen drop' wire and to push it and the wires beyond laterally so as thereby to tip A.them into yinfclined position and indicate the position f the broken warp, and a spring supported separator for normally maintaining the drop wires in position.

5. A warp stop motion for looms having,

in combination, a set of drop wires,'a de; tector slide, means for reciprocating the detector slide to engage aallen drop wire, a striker connected with the slide adapted to be lifted when the detector' slide engages a fallen 'drop wire so as thereby to be mov'gd to an. operative position, a rock lever haying a portion axlapted to be engaged by the Astriker in its operative position, a knockof slide rod provided with a striker, ,a lay, a striker plate carried by the lay adapted to hit the slide rod striker when the latter is moved` by the rock-lever, a shipper lever, connectins .between the knock-ofi' slide rod and the snipper lever having provision for if v. operating the latter to knock' off the loom after the knock-oil slide-rod is lifted upon- 'l yield when the drop wires are moved.

7. A warp stop motion for looms having,

in combination, a set of drop wires, means for supporting them, means for moving the Wires laterally Vto open the Warp when one of .the wires falls, and means'to cause loom stoppagethrough-tlie resistance of the Warps to lateral movement of the Wires.

8. A Warp stop motion for looms having, in combination, a set of drop wires, a deteCtor liavinga plurality of teeth, a Con- `tinnously oscillating lever, connections between the oscillatinglever and the detector for reciprocating the latter including a striker normally movable with the lever but adapted for movement relative to the lever Whentlie motion of the detector is opposed, and means cooperating with the striker when the latter is moved relatively to the lever for initiating knook-oof the loom.

.JONAS NORTHROP. 

